<template>
  <div class="app-container">
    讲师添加
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
        </el-button>
        <!--
    v-show：是否显示上传组件
    :key：类似于id，如果一个页面多个图片上传控件，可以做区分
    :url：后台上传的url地址
    @close：关闭上传组件
    @crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/eduoss/fileoss'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacher  from "@/api/edu/teacher";
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  components: { ImageCropper, PanThumb },
  data(){
    return{
      teacher:{
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: ''
      },
      imagecropperShow:false, //上传弹框是否显示
      imagecropperKey:0, //上传组件的key值
      BASE_API:process.env.BASE_API, //获取dev.env.js里的值
      saveBtnDisabled:false
    }
  },
  created(){
    this.init()
  },
  watch: { //监听
    $route(to, from) {
      this.init()
    }
  },
  methods:{
    close(){ //关闭弹框的方法
      this.imagecropperShow = false
      //上传组件初始化
      this.imagecropperKey = this.imagecropperKey+1
    },
    //上传成功的方法
    cropSuccess(data){
      this.imagecropperShow = false
      //上传后接口返回图片地址
      this.teacher.avatar = data.url
    },
    init(){
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id
        this.getInfo(id)
      }else {
        this.teacher={}
      }
    },
    //根据讲师id查询的方法
    getInfo(id){
      teacher.getTeacherInfo(id)
      .then(response=>{
        this.teacher = response.data.teacher
      })
    },
    saveOrUpdate(){
      //判断修改还是删除，根据teacher是否有id
      if(!this.teacher.id){
        //添加
        this.saveTeacher()
      }else {
        this.updateTeacher()
      }

    },
    //修改讲师的方法
    updateTeacher(){
      teacher.updateTeacher(this.teacher)
      .then(response=>{
        //提示信息
        this.$message({
          type: 'success',
          message: '修改成功!'
        });
        //回到列表页面
        this.$router.push({path:'/teacher/table'})
      })
    },
    //添加讲师方法
    saveTeacher(){
      teacher.addTeacher(this.teacher)
      .then(response=>{
        //提示信息
        this.$message({
          type: 'success',
          message: '添加成功!'
        });
        //回到列表页面
        this.$router.push({path:'/teacher/table'})
      })
    }
  }
}
</script>
